Gage and pump connection



H. P. KRAFT.

GAGE AND PUMP CONNECTION.

APPLICATION FILED APR. 3, 1919A Patented Afr. 12, 1921.

INVLLNTOR flkfi f v By Ailorneys,

ix I

, ll WHWHMNM will. UN 0% HENRY "5?. EZRA'ET, GE EIDGEWQQD, IVE-W JERSEY,ASfiIGNUE T SCHRADERS SON, INCORPQRATED, UE-BR 1392231 5791, NEW "3503K,A CDRPGEATION 03? NEW YORK.

' GAGE AN PUT i? CUNIQ'ECTIDEI e splicstlon flied April 3,

To all 'wizom. ii may conceivalie it known that. l, RY citizen of theUnited States of Americmrcsiding lliilgewood, in th county of Ben gen,and State of New Jersey, have invented certain new and userulimprovements in Gages and Pinup Conncctioi'is, of which the following isa specification.

This invention provides an attachment whereby a pressure gage maybeeppiiedito a pump coupling for pneumzubic tire valves.

Pump couplings are common. for connccir ingz the pump hose to the tirerelic, having a swivel screw union or coupling proper for engaging thethreaded nipple of the tire valve, with two internal check valves, theone between the sir inlet from the hose and the coupling, and the otherbetween the coupling and a. brunch outlet udepted'to receive a tiregage,- so that after pumping, the pressure may be taken by applying gageadapted to unseat the letter check valve and through i depress thedeflating stem of tire valve to admit. pressure from the tire to thegene. This. beingdone Without detaching the pump coupling, facilitatesthe continued pumping in of air if the pressure becomes insullicicut.Such a pump connection is setforth in il ntcnt No. 1,297,741, datedlilorch 18, 1919, and in applications filed June 26,1917. Serial No.17?,0033, and filed June 30, 1917, Serial No. US$27.

In my application No. 174,864, filed June 15, 1917, is set forth a.connection for uni-ting a tire gage to a pump h e or pump connecl'ion insuch manner that, the operation ot' taking a gage reading, eho'l'edescribed, may he perforn'ied, While yet the so con-- nected that itcannot become de ached or lost Without utlenst special 0; tion fordisengaging it from the connection. To this end the gage ishelcl in afitting wherein it has e sliding or telescopic movement, a spring beinginterposed to hold it normally out of engaging relation; upon bodilypressing down the gage against the yielding spring, it engages checkvalve contro ling the outlet to the and permits pres-- sure to enter theThe present invention introduces certain improvements on the constuccien forth in said last-named application, when plied to s pumpconnection such set forth in the three earlier applicetions iiistchoveliliAFX, a

fipccificetioii of Letters Fateirt.

Potcn icd n or. 123, i921.

1919. Serial No. 297,139,

named. The nature of the invention will be made sppiu-cnt as thedescription proceeds.

Figure 1 of the accompanying drawings is an elevation oi the gage andconnection;

Fig. 2 is a side view mainly in vertical S0 1nid-sccti0n.

Fig. 3 a fragmentary View on an enlarged scgile, showing the pumpcoupling united to the the valve, with the gage cletelic a reading.

to the drawings, A designates, us a whole, the pump connection, B thegage, and (7 the tire valve.

The pump connection A comprises as be etofore, an inlet branch 0: towhich the hi Se leading from the pump is attached, a v rtical branch Z),a swivel screw coupling 0, of usual construction, for screwing on hethreaded neck or nipple of the tire vah e, the inner duct or conduit ("Zhaving a check valve (2 in the branch oz, and the branch 6 containing acheck valve 7 for closing the outlet g leading from said branch to thecage. The latter check valve has a long to enter the screw coupling a,While its upper cndprojccls through a nipple c' which is screwed intothe upper part of the shell, and the upper end of the stem h normallyprojects considerably above the top of this 35 nipple, so that when thegei e-is pressed down it may he forced down tiereby to unseat the valve7', and in turn to press down the dciluting stem of the tire valve andunseat the check valve in the latte? to admit air pressure from the tireto the gflge.

According tothe present invention, a gage connection l) is attached tothe pump c0nnection A in such manner as to connect the gage ii to thepump connection. In the construction shmvn, this gage connection hasneck which embraces the upright branch boil the pump connection, andcomprises a cup-shaped portion 70 having an internal huh Z, and withouter Wallform- 109 ing Within it a chamber suf iciently large toreceive the Flanged foot ofthe gage B. To retain the gage, the upperportion of the cup is formed with an inturned flange m which normallyengages the ,ioot f ange of 195 the gage, as shown in Fig. 52. Whileother constructions are admissible, it is preferable to form thisconfining flange m upon a separate ring it which screws into the top ofthe cup 7c, oeing slipped over the gage after the 110 latter is appliedwithin the cup. Within. the cup is a spring E which normally;

shown in Fig. 2-.

in pui'nping up the tire thechcck valve is closed and the gage elevated,as shown in Fig; 2, and the entering air from the pump unseats thecheck. valve c. "When the .tire is thought to be sufiiciently inflated,the pun'ming is. stopped and a. gage reading is taken by bodily pressingdown the gage to presses up the age to inactive position, as-

the position shown in Flg. 3. At this time the check valve 6 willnormally be seated, and the depressionof the gagepushes down the valvestem h, unseating the check valve f and also opening the tire valve soas to admit pressure from the latter into the gage. If the gage readingshows that the pressure is sutiicient the pump coupling is uncoupled, Ifit shows that the pressure is insuilicient, the gage is released and thepumping operation resumed.

The described operation is the same as will be performed with theconstruction shown in Fig. 5. of my said application No.1741-,864r,filcd June 15, 1917.

The .improi ed construction provided by the present inventionconstitutes an attachment which may be added to the ordinary commercialpump connection A, this attachment comprising the cage connection D withits inclosed spring IL. This attachment is easily applied to; the pumpcoupling by merely unscrewing from the' latterthe usual screw nippleapplying connection D in place with its neck y embracing the portion '6,as shown, and replacing and screwing down tightly the nipple 2', whichhas a head or flange'sufiiciently broad to engage the hub Z. To; makethe gage connection airtight; a packing ring .orgasket p is inter poseo.

' In the construction shown in my lastnsmed s-pplication, the gageconnection is made large enough to pass over the gage,

am-ma a gage of the straight line or telescopic type.

The in,\'ention, however is not limited to this )articular form or typeof gage, the structure being adaptable to other gages by obviousmodification. in shape or proportion.

I claim is my invention 1. The combination witha pump connection, of agage connection comprising a cuplike structure adapted to receive thebase portion oi a tire gage, and having a contracted portion adapted toht upon the pump connection, and meanst'or clamping it thereto.

The combination with a pump 'connection, of a gage connection comprisinga cup like structure shaped-tor engagement with the pump connection,adapted 'to embrace the base portion of a tire gage, having an inturuedflange for engaging the base flange on such gage,and ii spring inclosedtherein for pressing up the gage.

3.. A gage connection according to claim 2. having its inturned flangeformed on a separate ring having a -threaded engagement with the upperportion of the cup-llkc striutturc.

4-. A gage connection accordii'ig to' claim 2, having a hub portionadapted to he clamped between the body of the pump connection and aflanged threaded nipple, and y a packing between the hub portion andpump connection.

In Witness whereof, I have hereunto signedflmy name. v

' HENRY P. KRAFT.

